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CHAPTER IV
RESULTS AND DISCUSSIONS
Analysis and Interpretation of Data Table 1: Mortality of Rice Bugs after Three Sets of Observation Periods and Replications Treatment/ Concentration No. of minutes Number of Dead Rice Bugs Mean Trial 1 Trial 2 Trial 3 T (50%) 10 20 30 0 0 0 0 1 1 0 0 2
T (75%) 10 20 30 0 1 2 0 1 1 0 0 2
T (100%) 10 20 30 0 2 3 0 1 2 0 1 3
T (Chix) 10 20 30 2 5 5 3 5 5 5 5 5
Table 1 shows the mortality of rice bugs after three sets of observation periods and replications. Among the three concentrations of Duhat extracts, Treatment 3 (100%) recorded the highest mean number of dead rice bugs. It was followed by Treatment 2 (75%) and Treatment 1 (50%) with mean numbers of 1.67 and 1, respectively. Treatment 4, which uses a commercial pesticide (Chix), gained a mean number of 5 dead rice bugs.
Table 2: Mean Percent Mortality of Rice Bugs Treated with Varied Concentrations of Duhat Extracts after 30 minutes Observation Period Treatment Percent Mortality Mean Percent Mortality Trial 1 Trial 2 Trial 3 T1 0 20 40 20 T2 40 20 40 33. T3 60 40 60 53. T4 100 100 100 100 Table 2 presents the mean percent mortality of rice bugs treated with varied concentrations of cassava extracts after 30 minutes observation period. Treatment 4 gained a perfect mean percent mortality of rice bugs which is 100%. Treatment 3 recorded a mean percent mortality of 53.33 %, highest among the varied concentrations of duhat extracts. It was followed by Treatment 2 and the Treatment 1 recorded the lowest mean percent mortality of rice bugs.
Table 4: Independent Samples T-test Results for the Pesticidal Effects of Varied Concentrations of Duhat Extracts on Rice Bugs Paired Comparisons Calculated t Tabular Value at 0.05 Level of Significance Decision T1 and T2 -1 2.78 Accept Ho T1 and T3 -2.5^ 2.78^ Accept Ho T1 and Pesticide -6.93^ 2.78^ Reject Ho T2 and T3 -2.12^ 2.78^ Accept Ho T2 and Pesticide -10^ 2.78^ Reject Ho T3 and Pesticide -7 2.78 Reject Ho Table 4 presents the Independent Samples T-test results for the pesticidal effects of varied concentrations of Duhat extracts on rice bugs. The calculated t of T1 and T2, T1 and T3, and T2 and T3 is lesser than the tabular value. Thus, the null hypothesis of no significant difference is accepted. The data suggest that each of the treatment has similarities in terms of their larvicidal effects. However, the pesticidal effect of varied concentrations of Duhat extracts is not comparable with the commercial pesticide. They have significant differences in terms of their effects based from calculated t and tabular value.
